Dumb People being dumb together
Twitter users using unpaid services that believed Twitter when they said it would be free forever, assuming their tweets would last forever, and no one would ever take over accounts, even when the owners died.
Twitter management pretending that unlimited free eternal storage was a business model. Convincing governments and businesses that that a closed and proprietary platform was the only reasonable solution to timely public outreach
Governments and the public blindly trusting Twitter when most accounts weren't verified, the ones that were were taken over by attackers, fraudsters, or disgruntled former employees. Building Twitter and Facebook into the new "digital town square" despite both being manifestly untrustworthy.
I feel the tiniest bit of sympathy for those that revisit the past tweets of a lost loved one. I went through a similar grieving process with an old voicemail from an ex. But if it was important you and you didn't make a effort to preserve it, you lost it by the choice of inaction as much as them taking it from you.
Not so much sympathy for those that built their own house on the sand. Twitter clearly had holes in it's account policies, and leaving most of the existing twitter handles attached to orphaned accounts dosen't make sense and never did. While this is now obvious in hindsight, it was obvious in foresight to many in the industry. If accurate, short, or legible accounts are desirable, than a service needs a way to reclaim them for old accounts, and a way to manage the fact that customers emails, telephone numbers, and addresses are just as transient, and change on the order of every few years, not on lifetimes.
Missing those cases was a human mistake for the first generation internet. If you launched after AOL and didn't have it in your stack of use case cards, your excuses probably suck. But most of the industry still is happy to leave sending a password reset link to an email address they validated exactly once 10 years ago as a users only option for account recovery.
Did I even have a point at this point? Humanity collectively sucks and we might not make it? Dunno.
Gonna start trying to update servers and hope I don't blow my foot or secure boot up with my warmed over monkey brains.